CodeSampleX

Sample

clean and sanitize semantic version strings with semver.clean

sha256:6a6b80f4dd37641c3c3dcc5ff82926ff99b53b5e503d63b630959b27ce0a9045

Publication state. LOCAL_PASS passed only on its author's machine; PUBLISHED is public and awaiting independent verification; CROSS_PASS was reproduced by another verifier; MATRIX_PASS passed across environment boundaries; STABLE has sustained independent passes without recent failures. Evidence strength. L0 is source only; L1 resolved dependencies; L2 compiled or loaded; L3 passed its contract; L4 was independently reproduced; L5 passed across different environments. MIT-0

Execution evidence

Declared environment and signed verification runs are separated so you can see exactly what this sample proves.

Evidence basis
Independent cross-verification
Verification receipts
1
Verification level
L4_CROSS_PASS
Declared environment node windows 11 x64 node javascript npm

Verification-run environments

Environment Contract Stages Run
node 22 · linux alpine/x64 · docker ed25519:2175b912ea1c23b1 PASS compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS
CONTAINER_RUN · node-typescript@1
2026-08-19

Case

HOW
Goal
clean and sanitize semantic version strings with semver.clean
Packages
Symbols
  • clean
Environment
node
Created
2026-08-18T23:58:28Z

Contract

  1. semver.clean strips leading whitespace, 'v' prefixes, and '=' characters from standard version strings
  2. semver.clean preserves prerelease tags while stripping build metadata from cleaned versions
  3. semver.clean returns null for invalid version strings, range expressions, and incomplete versions
  4. semver.clean supports loose mode and options configuration passed to parser
  5. semver.clean throws TypeError when non-string or nullish values are passed

Files

  • PROMPT.md
  • csx.json
  • index.mjs
  • package-lock.json
  • package.json
  • spec.json
  • test/contract.mjs

Download the source artifact (tar.gz)

Origin Seeder

anonymous